Question

I am having trouble with these questions, please help!9. Nitric oxide is made from the oxidation of ammonia. How many moles of nitric oxide can be made from the reaction of 3.80 mol NH3 with 5.15 mol O2?4 NH3(g) + 5 O2(g) ? 4 NO(g) + 6 H2O(g) 3.80 mol 4.12 mol 5.15 mol 6.44 mol 8.95 mol6. What is a correct method for determining how many moles of calcium oxide are produced in the reaction of 10.0 g calcium with excess oxygen?2 Ca(s) + O2(g) ? 2 CaO(s) 10 g Ca x [1 mol/40.07 g] x 56.07 g/mol 10 g Ca x [2 mole CaO/ 2mole Ca] x [56.07 g/mol] 10 g Ca x 40.07 g/mol x [56.07 g/mol] 10 g Ca x [2 mole Ca / 2 mole CaO] x 40.07 g/mol 40.07 g/mol x 10 g/mol x [2 mole CaO/2 mole Ca] 4. Which of the following are oxidation-reduction reactions?1.Zn(s) + CuSO4(aq) ? ZnSO4(aq) + Cu(s)2.Pb(ClO4)2(aq) + 2 KI(aq) ? PbI2(s) + 2 NaClO4(aq)3.CaCO3(s) ? CO2(g) + CaO(s) 1 only 2 only 1 and 2 1 and 36. Iron pyrite if often called